My thought is if you want a DD that is a smallish suv/truck and you want it to be a tow vehicle, you'll never find one thats good at both. Lots of people use full size trucks as DDs and just like a previous poster said that towing with a barely capable tow vehicle is not fun. I've had my Cherokee and a trailer loaded down with construction debris and it certainly was less than the weight of a car and I definitately felt like I needed an upgrade in the brakes department. (I only drove through town.)
I still stand by my original post of the Full Size Jeep Grand Wagoneer. You'll be able to tow your car around without noticing and still be able to go offroading. (Of course most full size trucks with 4X4 will be able to do that, I'm just partial to the FSJs). My Cherokee is a great DD, though (barely gets 18mpg overall), but I wouldnt consider it a tow rig.

+
= Powerful tow rig!!!